eprintid: 26 rev_number: 18 eprint_status: archive userid: 1 dir: disk0/00/00/00/26 datestamp: 2011-05-19 05:04:20 lastmod: 2011-06-23 11:57:54 status_changed: 2011-05-19 05:04:20 type: article metadata_visibility: show contact_email: Library-ICRISAT@cgiar.org item_issues_count: 0 creators_name: Zaman-Allah, M creators_name: Jenkinson, D M creators_name: Vadez, V icrisatcreators_name: Zaman-Allah, M icrisatcreators_name: Vadez, V affiliation: ICRISAT(Patancheru) affiliation: University of Sydney(New South Wales) country: India country: Australia title: Chickpea genotypes contrasting for seed yield under terminal drought stress in the field differ for traits related to the control of water use ispublished: pub subjects: s1.1 full_text_status: restricted keywords: early vigour, infrared thermography, leaf conductance, transpiration, vapour pressure deficit agrotags: Agrotags - genotypes | irrigation | transpiration | leaf area | tolerance | planting | chickpeas | drought | rations | soil
Fishtags - drying | pearls
Geopoliticaltags - atmosphere | usa | maine | india note: This work was supported by fund from the the Government of Japan to ICRISAT, by a grant from the Bill and Melinda Gates Foundation (Tropical Legume Project – Phase 2) through the Generation Challenge Program, and by ICRISAT support through the Blue Sky Research initiative on aquaporins. abstract: Chickpea (Cicer arietinum L.) is often exposed to terminal drought, and deep, profuse rooting has been proposed as the main breeding target to improve terminal drought tolerance. This work tested whether plant water use at the vegetative stage and under non-limited water conditions could relate to the degree of sensitivity of chickpea to terminal drought. Transpiration response to a range of vapour pressure deficits under controlled and outdoor conditions was measured with canopy conductance using gravimetric measurements and thermal imagery in eight chickpea genotypes with comparable phenology and contrasting seed yield under terminal drought in the field. Additionally, the response of plant growth and transpiration to progressive soil moisture depletion was assayed in the same genotypes. Drought-tolerant genotypes had a lower canopy conductance under fully irrigated conditions at the vegetative stage; this trend was reversed at the early pod filling stage. While two sensitive genotypes had high early growth vigour and leaf development, there was a trend of lower growth in tolerant genotypes under progressive soil drying than in sensitive ones. Tolerant genotypes also exhibited a decline of transpiration in wetter soil compared to sensitive genotypes. Canopy conductance could be proxied by measuring leaf temperature with an infrared camera, although the relationship lost sensitivity at the pod filling stage. This work suggests that some traits contribute to water saving when water does not limit plant growth and development in drought-tolerant chickpea. It is hypothesised that this water would be available for the reproduction and grain filling stages. date: 2011 date_type: published publication: Functional Plant Biology volume: 38 number: 4 publisher: CSIRO Publishing pagerange: 270-281 refereed: TRUE issn: 1445-4408 official_url: http://dx.doi.org/10.1071/FP10244 related_url_url: http://scholar.google.co.in/scholar?as_q=%22Chickpea+genotypes+contrasting+for+seed+yield+under+terminal+drought+stress+in+the+field+differ+for+traits+related+to+the+control+of+water+use%22&num=10&btnG=Search+Scholar&as_epq=&as_oq=&as_eq=&as_occt=any&as_s related_url_type: author funders: Government of Japan funders: Bill and Melinda Gates Foundation funders: Blue Sky Research initiative on aquaporins citation: Zaman-Allah, M and Jenkinson, D M and Vadez, V (2011) Chickpea genotypes contrasting for seed yield under terminal drought stress in the field differ for traits related to the control of water use. Functional Plant Biology, 38 (4). pp. 270-281. ISSN 1445-4408 document_url: http://oar.icrisat.org/26/1/Zaman_et_al_-_FPB_-_Revision_merged.pdf document_url: http://oar.icrisat.org/26/2/FP10244.pdf